Humidifier base



FIG. 1 is a perspective view of a humidifier base according to ourdesign;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof; and,

FIG. 4 is a left side view thereof.

Where included, broken lines showing environment or structure are forillustrative purposes only and form no part of the claimed design.

The ornamental design of a humidifier base, as shown and described.